US3859575B1 - - Google Patents
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- Publication number
- US3859575B1 US3859575B1 US44102674A US3859575B1 US 3859575 B1 US3859575 B1 US 3859575B1 US 44102674 A US44102674 A US 44102674A US 3859575 B1 US3859575 B1 US 3859575B1
- Authority
- US
- United States
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
- G01L9/0005—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in capacitance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US441026A US3859575A (en) | 1974-02-11 | 1974-02-11 | Variable capacitance sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US441026A US3859575A (en) | 1974-02-11 | 1974-02-11 | Variable capacitance sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
US3859575A US3859575A (en) | 1975-01-07 |
US3859575B1 true US3859575B1 (fr) | 1988-05-03 |
Family
ID=23751195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US441026A Expired - Lifetime US3859575A (en) | 1974-02-11 | 1974-02-11 | Variable capacitance sensor |
Country Status (1)
Country | Link |
---|---|
US (1) | US3859575A (fr) |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3965746A (en) * | 1974-11-04 | 1976-06-29 | Teledyne Industries, Inc. | Pressure transducer |
US4064549A (en) * | 1976-08-31 | 1977-12-20 | Metrolology General Corporation | Cylindrical capacitive quartz transducer |
US4089036A (en) * | 1974-04-04 | 1978-05-09 | Rosemount Inc. | Capacitive load cell |
US4125027A (en) * | 1977-11-04 | 1978-11-14 | Geophysical Research Corporation | Gauge for remotely indicating the pressure of a subterranean formation |
US4168518A (en) * | 1977-05-10 | 1979-09-18 | Lee Shih Y | Capacitor transducer |
US4227418A (en) * | 1979-09-24 | 1980-10-14 | Fischer & Porter Company | Capacitive pressure transducer |
US4391146A (en) * | 1981-06-01 | 1983-07-05 | Rosemount Inc. | Parallel T impedance measurement circuit for use with variable impedance sensor |
DE3303980A1 (de) * | 1983-02-05 | 1984-09-27 | Erich 7993 Kressbronn Brosa | Hochdruckaufnehmer |
US4507973A (en) * | 1983-08-31 | 1985-04-02 | Borg-Warner Corporation | Housing for capacitive pressure sensor |
US4523474A (en) * | 1983-08-12 | 1985-06-18 | Borg-Warner Corporation | Capacitive pressure sensor |
US4555952A (en) * | 1984-06-08 | 1985-12-03 | Borg-Warner Corporation | Differential pressure sensor |
US4719538A (en) * | 1986-12-02 | 1988-01-12 | Cox John D | Force responsive capacitive transducer |
DE3820878A1 (de) * | 1988-06-21 | 1989-12-28 | Wolfgang Dipl Phys Scholl | Kapazitives sensorelement zum aufbau mechanisch-elektrischer messwandler |
US4944187A (en) * | 1988-12-23 | 1990-07-31 | Rosemount Inc. | Multimodulus pressure sensor |
US4951236A (en) * | 1986-05-05 | 1990-08-21 | Texas Instruments Incorporated | Low cost high precision sensor |
WO1991010888A1 (fr) * | 1990-01-10 | 1991-07-25 | Setra Systems, Inc. | Detecteur de pression monte affleurant |
GB2240397A (en) * | 1990-01-27 | 1991-07-31 | Dobson Park Ind | Capacitive transducer |
US5165281A (en) * | 1989-09-22 | 1992-11-24 | Bell Robert L | High pressure capacitive transducer |
US5259247A (en) * | 1991-02-28 | 1993-11-09 | Robert Bosch Gmbh | Sensor |
US5542300A (en) * | 1994-01-24 | 1996-08-06 | Setra Systems, Inc. | Low cost, center-mounted capacitive pressure sensor |
US20040102912A1 (en) * | 2002-11-26 | 2004-05-27 | Lav Ivanovic | Automatic calibration of a masking process simulator |
US20060053893A1 (en) * | 2002-06-19 | 2006-03-16 | Karl-Heinz Banholzer | Pressure measuring unit |
US20060065973A1 (en) * | 2004-09-29 | 2006-03-30 | Loadstar Sensors, Inc. | Gap-change sensing through capacitive techniques |
US20060144159A1 (en) * | 2004-12-22 | 2006-07-06 | Weiss John W | Light powered pressure gauge |
US20060267321A1 (en) * | 2005-05-27 | 2006-11-30 | Loadstar Sensors, Inc. | On-board vehicle seat capacitive force sensing device and method |
US20070205776A1 (en) * | 2006-03-01 | 2007-09-06 | Loadstar Sensors, Inc. | Cylindrical capacitive force sensing device and method |
US20070227257A1 (en) * | 2006-04-03 | 2007-10-04 | Loadstar Sensors, Inc. | Multi-zone capacitive force sensing device and methods |
US7353713B2 (en) | 2003-04-09 | 2008-04-08 | Loadstar Sensors, Inc. | Flexible apparatus and method to enhance capacitive force sensing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2179068A (en) * | 1937-12-09 | 1939-11-07 | Sprague Specialties Co | Variable condenser |
US3230431A (en) * | 1962-09-20 | 1966-01-18 | Standard Kollsman Ind Inc | Combination feed-through and trimmer capacitor |
-
1974
- 1974-02-11 US US441026A patent/US3859575A/en not_active Expired - Lifetime
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4089036A (en) * | 1974-04-04 | 1978-05-09 | Rosemount Inc. | Capacitive load cell |
US3965746A (en) * | 1974-11-04 | 1976-06-29 | Teledyne Industries, Inc. | Pressure transducer |
US4064549A (en) * | 1976-08-31 | 1977-12-20 | Metrolology General Corporation | Cylindrical capacitive quartz transducer |
US4168518A (en) * | 1977-05-10 | 1979-09-18 | Lee Shih Y | Capacitor transducer |
US4125027A (en) * | 1977-11-04 | 1978-11-14 | Geophysical Research Corporation | Gauge for remotely indicating the pressure of a subterranean formation |
US4227418A (en) * | 1979-09-24 | 1980-10-14 | Fischer & Porter Company | Capacitive pressure transducer |
US4391146A (en) * | 1981-06-01 | 1983-07-05 | Rosemount Inc. | Parallel T impedance measurement circuit for use with variable impedance sensor |
DE3303980A1 (de) * | 1983-02-05 | 1984-09-27 | Erich 7993 Kressbronn Brosa | Hochdruckaufnehmer |
US4523474A (en) * | 1983-08-12 | 1985-06-18 | Borg-Warner Corporation | Capacitive pressure sensor |
US4507973A (en) * | 1983-08-31 | 1985-04-02 | Borg-Warner Corporation | Housing for capacitive pressure sensor |
US4555952A (en) * | 1984-06-08 | 1985-12-03 | Borg-Warner Corporation | Differential pressure sensor |
EP0164240A2 (fr) * | 1984-06-08 | 1985-12-11 | Borg-Warner Corporation | Capteur de pression différentielle |
EP0164240A3 (fr) * | 1984-06-08 | 1987-06-24 | Borg-Warner Corporation | Capteur de pression différentielle |
US4951236A (en) * | 1986-05-05 | 1990-08-21 | Texas Instruments Incorporated | Low cost high precision sensor |
US4719538A (en) * | 1986-12-02 | 1988-01-12 | Cox John D | Force responsive capacitive transducer |
DE3820878A1 (de) * | 1988-06-21 | 1989-12-28 | Wolfgang Dipl Phys Scholl | Kapazitives sensorelement zum aufbau mechanisch-elektrischer messwandler |
US4944187A (en) * | 1988-12-23 | 1990-07-31 | Rosemount Inc. | Multimodulus pressure sensor |
US5165281A (en) * | 1989-09-22 | 1992-11-24 | Bell Robert L | High pressure capacitive transducer |
WO1991010888A1 (fr) * | 1990-01-10 | 1991-07-25 | Setra Systems, Inc. | Detecteur de pression monte affleurant |
US5115676A (en) * | 1990-01-10 | 1992-05-26 | Setra Systems, Inc. | Flush-mounted pressure sensor |
GB2240397A (en) * | 1990-01-27 | 1991-07-31 | Dobson Park Ind | Capacitive transducer |
US5259247A (en) * | 1991-02-28 | 1993-11-09 | Robert Bosch Gmbh | Sensor |
US5542300A (en) * | 1994-01-24 | 1996-08-06 | Setra Systems, Inc. | Low cost, center-mounted capacitive pressure sensor |
EP0741906A1 (fr) * | 1994-01-24 | 1996-11-13 | Setra Systems, Inc. | Capteur de pression capacitif a montage central, a faible cout de fabrication |
EP0741906A4 (fr) * | 1994-01-24 | 1998-04-15 | Setra Systems Inc | Capteur de pression capacitif a montage central, a faible cout de fabrication |
US20060053893A1 (en) * | 2002-06-19 | 2006-03-16 | Karl-Heinz Banholzer | Pressure measuring unit |
US20040102912A1 (en) * | 2002-11-26 | 2004-05-27 | Lav Ivanovic | Automatic calibration of a masking process simulator |
US7353713B2 (en) | 2003-04-09 | 2008-04-08 | Loadstar Sensors, Inc. | Flexible apparatus and method to enhance capacitive force sensing |
US20060065973A1 (en) * | 2004-09-29 | 2006-03-30 | Loadstar Sensors, Inc. | Gap-change sensing through capacitive techniques |
US7451659B2 (en) | 2004-09-29 | 2008-11-18 | Loadstar Sensors, Inc. | Gap-change sensing through capacitive techniques |
US20060144159A1 (en) * | 2004-12-22 | 2006-07-06 | Weiss John W | Light powered pressure gauge |
US7228743B2 (en) | 2004-12-22 | 2007-06-12 | Weiss Instruments, Inc. | Light powered pressure gauge |
US20060267321A1 (en) * | 2005-05-27 | 2006-11-30 | Loadstar Sensors, Inc. | On-board vehicle seat capacitive force sensing device and method |
US20070205776A1 (en) * | 2006-03-01 | 2007-09-06 | Loadstar Sensors, Inc. | Cylindrical capacitive force sensing device and method |
US7570065B2 (en) | 2006-03-01 | 2009-08-04 | Loadstar Sensors Inc | Cylindrical capacitive force sensing device and method |
US7343814B2 (en) | 2006-04-03 | 2008-03-18 | Loadstar Sensors, Inc. | Multi-zone capacitive force sensing device and methods |
US20070227257A1 (en) * | 2006-04-03 | 2007-10-04 | Loadstar Sensors, Inc. | Multi-zone capacitive force sensing device and methods |
Also Published As
Publication number | Publication date |
---|---|
US3859575A (en) | 1975-01-07 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
RR | Request for reexamination filed |
Effective date: 19870605 |
|
B1 | Reexamination certificate first reexamination |